Northern Rim...yet another cheap shortie .22

jjohnwm

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Yeah, I did it again. Just unpacked a box from Tenda containing one of their new short-barrelled bolt .22's. This whole category of rifles is one that I find strangely appealing; they're cheap, and they can have considerable charm if their combination of warts and beauty marks happens to average out well for you.
20260710_170649.jpg

In this case, the NorthernRim CB22 immediately called to mind the Scorpio shortie that I had back about a year ago, when they were a topic of considerable discussion on MFK. Like the Scorpio, the NorthernRim is made in China. Like the Scorpio, I find the stock on the NorthernRim to be very ergonomic and comfortable, but in this case it's also pretty nice to look at as well. It's not walnut, not sure of the wood species, but it is well-shaped, very decently finished and equipped with several panels of very serviceable checkering done by robots or lasers or robots using lasers. There's a nice rubber butt pad, well-fitted and more substantial than those found on many centerfire rifles. Overall, the stock is one of the nicest things about this gun; it is absolutely the nicest wood stock I have encountered on any wood-stocked Chinese rifle I have owned or handled. I almost ordered the synthetic version when the wood ones sold out immediately, but now I am very pleased that I waited long enough for the wood ones to re-stock before I ordered.

The gun comes with a couple of clear-plastic 10-round rotary mags of 10/22-pattern. I tried these mags in a 10/22 and also used the OEM Ruger mags in this rifle; all combinations functioned perfectly. This is, IMHO, a big improvement over the mag choices on some of the other recent Chinese .22's that use Anschutz- or CZ-clone magazines...but that's partially because I have a bunch more 10/22 mags myself already...and partially because I just like flush-fit magazines.

The bolt action is pretty rough and gritty; I think it's considerably worse than the Scorpio was right out of the box, but can't be sure since that gun went down the road months ago so I can't compare directly. I'm sure that a bunch of cycling, perhaps with some super-fine abrasive, will smooth this gun out. I experienced zero failures to feed, fire, extract or eject through just over 100 rounds fired, even when experimenting with somewhat feeble and gentle manipulation of the bolt. The Scorpio, in contrast, failed to feed with regularity until you got to know how to manhandle it. But cheap guns just encourage bolt manipulation done in an aggressive manner.

The trigger is...a trigger. The actual trigger release is not really what you'd call crisp, but the trigger action leading up to the release is definitely down-right crunchy. Usually, the roughness leads to an audible and tactile click that could perhaps be described as the take-up of a two-stage. After that point, a bit more grinding and crunching eventually gets one to the trigger release itself. But sometimes the crunchiness is extra-pronounced and seems to by-pass the two-stage process and proceeds right to the the release. It's great fun trying to guess which trigger pull you'll get each time, keeps you on your toes. In contrast, the Scorpio that I had was actually much less crunchy...is that the correct terminology?...but it was also weird and spongy and creepy. I think that the NorthernRim trigger will smooth out with use and maybe a bit of cautious polishing, and has the potential to be far superior...but only time will tell.

Metal finish is okay, although IIRC the Scorpio was a bit more polished. Wood-to-metal fit is much better than I expected on the NorthernRim. The receiver is grooved for standard rimfire rings, but like other Chinese guns this one has a fairly pronounced rounded top on the receiver; you'll need rings that are concave on the bottom to accommodate this. Or you can use the Picatinny rail section that the gun comes with; this is a huge improvement over the idiotic gizmo that came with the Scorpio. This rail is simply screwed with a couple of substantial fasteners to the d&t'ed holes in the top of the receiver. I didn't use it at all; as with the Scorpio, I just used a pair of dovetail rings by Millett from out of my stash of assorted accumulated junk. Doing so keeps the scope nice and low, as I want it, and I don't need the optics mount on a cheap .22 plinker to be able to withstand tremendous stress and strain so I much prefer the lighter, cleaner install provided by quality .22 rings.

Both guns were fired using very low-powered straight-tube scopes. At 50 yards, I don't feel that these handicapped me very much, shooting at 3-inch bulls. In both cases, mounting a bulbous target-oriented scope would help a bit, but IMHO guns like these call for small, lightweight, short scopes that produce a more balanced handling package than a big target scope with a little rifle bolted underneath it. I won't ever be spending hours of range time to test out every ammo on the market to find that last tiny bit of accuracy, and I sure as hell won't be feeding premium or ultra-premium target ammo through this rifle.

Accuracy? Hmm, not really fair to comment yet as all I have used in it is an assortment of leftovers and tail ends of boxes of a wide range of .22 ammo. It was really just an attempt to see how the gun feeds, fires, extracts and ejects, and it did all those things flawlessly with everything I tried in it. It ejects empties nicely about 5 - 6 feet to the side, instead of barely dropping them at my feet as the Scorpio did. It was easy to see the individual holes through the spotting scope, since none of them were very close to each other. :) But, again, I was using what essentially amounted to mixed handfulls of different brands, velocities and bullet weights, so I will withhold judgment on it for now. Group sizes varied from 2" to 4" at 50 yards. I remain hopeful.

So, in some ways this gun is better than the Scorpio, in some ways it's worse...and in general, the two guns are very similar even if they look entirely different. They are both very inexpensive, they seem reasonably well made, and I believe that both can be improved dramatically from their as-delivered condition. They're both a bit of a PITA to scope; sadly, I suspect that most folks will be forced to use the Pic rails simply because they won't have access to one of the few brands/models of rimfire rings that will fit the curved receiver.

Both guns have their strengths and weaknesses, and selecting one over the other will of course be a matter of personal taste. And Chinese guns being what they are, it's important to bear in mind that this is a comparison between single samples; there's likely to be a fair bit of variation from one specimen to the next.

My preference? Neither! IMHO, the crown for "best of the cheapest" goes to the Chiappa Bootleg whatchamacallit lever gun; I am enjoying mine so much that I will be getting a full-size buttstock for it which will bulk it up a bit but make it easier to shoot. That little gun has exhibited perfect performance since day one, reasonable accuracy, surprisingly nice trigger feel...and it's a levergun! But I like bolt guns as well and I hope the NorthernRim comes to live here permanently. :)
 
Yeah, I did it again. Just unpacked a box from Tenda containing one of their new short-barrelled bolt .22's. This whole category of rifles is one that I find strangely appealing; they're cheap, and they can have considerable charm if their combination of warts and beauty marks happens to average out well for you.
View attachment 1173082

In this case, the NorthernRim CB22 immediately called to mind the Scorpio shortie that I had back about a year ago, when they were a topic of considerable discussion on MFK. Like the Scorpio, the NorthernRim is made in China. Like the Scorpio, I find the stock on the NorthernRim to be very ergonomic and comfortable, but in this case it's also pretty nice to look at as well. It's not walnut, not sure of the wood species, but it is well-shaped, very decently finished and equipped with several panels of very serviceable checkering done by robots or lasers or robots using lasers. There's a nice rubber butt pad, well-fitted and more substantial than those found on many centerfire rifles. Overall, the stock is one of the nicest things about this gun; it is absolutely the nicest wood stock I have encountered on any wood-stocked Chinese rifle I have owned or handled. I almost ordered the synthetic version when the wood ones sold out immediately, but now I am very pleased that I waited long enough for the wood ones to re-stock before I ordered.

The gun comes with a couple of clear-plastic 10-round rotary mags of 10/22-pattern. I tried these mags in a 10/22 and also used the OEM Ruger mags in this rifle; all combinations functioned perfectly. This is, IMHO, a big improvement over the mag choices on some of the other recent Chinese .22's that use Anschutz- or CZ-clone magazines...but that's partially because I have a bunch more 10/22 mags myself already...and partially because I just like flush-fit magazines.

The bolt action is pretty rough and gritty; I think it's considerably worse than the Scorpio was right out of the box, but can't be sure since that gun went down the road months ago so I can't compare directly. I'm sure that a bunch of cycling, perhaps with some super-fine abrasive, will smooth this gun out. I experienced zero failures to feed, fire, extract or eject through just over 100 rounds fired, even when experimenting with somewhat feeble and gentle manipulation of the bolt. The Scorpio, in contrast, failed to feed with regularity until you got to know how to manhandle it. But cheap guns just encourage bolt manipulation done in an aggressive manner.

The trigger is...a trigger. The actual trigger release is not really what you'd call crisp, but the trigger action leading up to the release is definitely down-right crunchy. Usually, the roughness leads to an audible and tactile click that could perhaps be described as the take-up of a two-stage. After that point, a bit more grinding and crunching eventually gets one to the trigger release itself. But sometimes the crunchiness is extra-pronounced and seems to by-pass the two-stage process and proceeds right to the the release. It's great fun trying to guess which trigger pull you'll get each time, keeps you on your toes. In contrast, the Scorpio that I had was actually much less crunchy...is that the correct terminology?...but it was also weird and spongy and creepy. I think that the NorthernRim trigger will smooth out with use and maybe a bit of cautious polishing, and has the potential to be far superior...but only time will tell.

Metal finish is okay, although IIRC the Scorpio was a bit more polished. Wood-to-metal fit is much better than I expected on the NorthernRim. The receiver is grooved for standard rimfire rings, but like other Chinese guns this one has a fairly pronounced rounded top on the receiver; you'll need rings that are concave on the bottom to accommodate this. Or you can use the Picatinny rail section that the gun comes with; this is a huge improvement over the idiotic gizmo that came with the Scorpio. This rail is simply screwed with a couple of substantial fasteners to the d&t'ed holes in the top of the receiver. I didn't use it at all; as with the Scorpio, I just used a pair of dovetail rings by Millett from out of my stash of assorted accumulated junk. Doing so keeps the scope nice and low, as I want it, and I don't need the optics mount on a cheap .22 plinker to be able to withstand tremendous stress and strain so I much prefer the lighter, cleaner install provided by quality .22 rings.

Both guns were fired using very low-powered straight-tube scopes. At 50 yards, I don't feel that these handicapped me very much, shooting at 3-inch bulls. In both cases, mounting a bulbous target-oriented scope would help a bit, but IMHO guns like these call for small, lightweight, short scopes that produce a more balanced handling package than a big target scope with a little rifle bolted underneath it. I won't ever be spending hours of range time to test out every ammo on the market to find that last tiny bit of accuracy, and I sure as hell won't be feeding premium or ultra-premium target ammo through this rifle.

Accuracy? Hmm, not really fair to comment yet as all I have used in it is an assortment of leftovers and tail ends of boxes of a wide range of .22 ammo. It was really just an attempt to see how the gun feeds, fires, extracts and ejects, and it did all those things flawlessly with everything I tried in it. It ejects empties nicely about 5 - 6 feet to the side, instead of barely dropping them at my feet as the Scorpio did. It was easy to see the individual holes through the spotting scope, since none of them were very close to each other. :) But, again, I was using what essentially amounted to mixed handfulls of different brands, velocities and bullet weights, so I will withhold judgment on it for now. Group sizes varied from 2" to 4" at 50 yards. I remain hopeful.

So, in some ways this gun is better than the Scorpio, in some ways it's worse...and in general, the two guns are very similar even if they look entirely different. They are both very inexpensive, they seem reasonably well made, and I believe that both can be improved dramatically from their as-delivered condition. They're both a bit of a PITA to scope; sadly, I suspect that most folks will be forced to use the Pic rails simply because they won't have access to one of the few brands/models of rimfire rings that will fit the curved receiver.

Both guns have their strengths and weaknesses, and selecting one over the other will of course be a matter of personal taste. And Chinese guns being what they are, it's important to bear in mind that this is a comparison between single samples; there's likely to be a fair bit of variation from one specimen to the next.

My preference? Neither! IMHO, the crown for "best of the cheapest" goes to the Chiappa Bootleg whatchamacallit lever gun; I am enjoying mine so much that I will be getting a full-size buttstock for it which will bulk it up a bit but make it easier to shoot. That little gun has exhibited perfect performance since day one, reasonable accuracy, surprisingly nice trigger feel...and it's a levergun! But I like bolt guns as well and I hope the NorthernRim comes to live here permanently. :)
Thanks John for this very in depth report. Oddly enough I too really like the look of this 13" barreled 22. I like the wood, the tactical bolt handle, and the fact it comes with a grooved receiver. Not everyone needs a picatinny type base to mount a scope on.......:LOL:

Please let us know if the accuracy gets better. Two to four inch groups are not ideal, however I get you were function testing with whatever ammo you could find.....:)

If one has to shoot Center-X Lapua 22 LR ammo to get under one inch at 50 yards, I don't see the point. But if one can get 3/4" to 1" at 50 yards with CCI Blazers or Federal American Eagle AE-22 hollow points, then I'd be more interested.

Please let us know how your accuracy hunting goes!

Thanks again for the awesome report.

John (TH)
 
I see Tenda no longer has these in stock.....:(

Update: I seem to have found them at Tenda again.....:)

https://www.gotenda.com/product/northernrim-22-lr-13-bolt-action-10rd-wood/

What was the cost to your door with taxes in John?.........:unsure:

$325.00 for the rifle.
$16.25 for 5% GST.
Free shipping?
Any Provincial taxes applied?

So best case scenario with free shipping and 5% GST, equals = $341.25 to ones door.

A Savage Mark II that is normally a tack driver, and reliable can be purchased for this amount. I guess I'm getting cheap in my ole' age!.......:ROFLMAO:đź’°;)
 
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Good report, tfs. Good that they have the 'upgraded trigger' if it is as poor as you say
Waiting to see someone dissect the trigger for a fix of some sort. Like on the Scorpio 'make a purse from sows ear' thread
will probably try the 20" version w/sights
 
Good report, tfs. Good that they have the 'upgraded trigger' if it is as poor as you say
Waiting to see someone dissect the trigger for a fix of some sort. Like on the Scorpio 'make a purse from sows ear' thread
will probably try the 20" version w/sights
I have the 13” model. So far the only thing I like about it over the Scorpio is the wood stock. Mine Misfires/light strikes every eley ammo I’ve tried.
I’m going to check the head space but I’m sure it’s at the maximum. Blazer ammo fired without issue. Accuracy wasn’t great with any ammo I tried , I’m not sure but I think the fire control is the the problem accuracy wise , very inconsistent.
 
It never ceases to amaze me. I get the low price point, and obviously more guns is always better, but why would the old-timers want one? Just about everyone with a 20+ trader rating already has a CZ or an Anschutz in their safe.
 
What was the cost to your door with taxes in John?.........:unsure:

$325.00 for the rifle.
$16.25 for 5% GST.
Free shipping?
Any Provincial taxes applied?

So best case scenario with free shipping and 5% GST, equals = $341.25 to ones door.

A Savage Mark II that is normally a tack driver, and reliable can be purchased for this amount. I guess I'm getting cheap in my ole' age!.......:ROFLMAO:đź’°;)
Your math is correct, and since Tenda is in Ontario and I'm in Manitoba there is no provincial tax. But NorthernRim packs this short little rifle into the same box they use for the long version; the box is largely empty space, but it's still over 40 inches long and thus gets dinged by Canada Post for an extra $22.05 in oversize fees, bringing the total to $363.30 to me. :(

Sure, I could likely have gotten another Savage MkII for that; so what? I wanted to try something new, and I am a sucker for short rifles. I'll play with this, keep it or sell it when I decide, and if I lose a few bucks on the deal it's just the cost of the experience of trying out a new gun.


Good report, tfs. Good that they have the 'upgraded trigger' if it is as poor as you say
Waiting to see someone dissect the trigger for a fix of some sort. Like on the Scorpio 'make a purse from sows ear' thread
will probably try the 20" version w/sights
Dang, I wish I hadn't read your post. It made me check out Tenda's site again, where I now see the mention of the upgraded trigger. If it turns out that I am one of the lucky few that got saddled with the original coffee-grinder unit, and later guns are improved...I will be pissed. :(


I have the 13” model. So far the only thing I like about it over the Scorpio is the wood stock. Mine Misfires/light strikes every eley ammo I’ve tried.
I’m going to check the head space but I’m sure it’s at the maximum. Blazer ammo fired without issue. Accuracy wasn’t great with any ammo I tried , I’m not sure but I think the fire control is the the problem accuracy wise , very inconsistent.
Mine functions perfectly with every ammo I've tried. I have no idea if Eley would work in it, and I never will. No way I will feed premium stuff to this gun. My cheap-ass POS Chinese rifle simply must function well with cheap-ass POS ammo; otherwise...'bye!

Too soon for me to say that it won't shoot well. I will play with it a bit, will definitely try some standard-velocity stuff (only had hi-vel on hand for initial shooting), might even temporarily mount a bigger scope for testing.

This is CGN, somebody will immediately figure out a way to improve the trigger. If it isn't too much trouble, I might follow their lead and do it...maybe...since I do think that it's the major contributor to the accuracy woes.


It never ceases to amaze me. I get the low price point, and obviously more guns is always better, but why would the old-timers want one? Just about everyone with a 20+ trader rating already has a CZ or an Anschutz in their safe.
Yep...got several Anschutz, Walther and other top-line target rimfires, a bunch of Savages and CZ's, plus assorted other bolts, levers, semi-autos, etc. So what? This is something new and different to play with.

Frankly, when an unknown quantity like this new rifle comes onto the scene, it makes more sense for me to own one than for a new shooter who has few or no other rifles to buy one. I sure as hell wouldn't want to rely upon a new Chinese mystery rifle as my main shooter. It only makes sense...IMHO...to treat it like a novelty, and that's what I will be doing. :)
 
Your math is correct, and since Tenda is in Ontario and I'm in Manitoba there is no provincial tax. But NorthernRim packs this short little rifle into the same box they use for the long version; the box is largely empty space, but it's still over 40 inches long and thus gets dinged by Canada Post for an extra $22.05 in oversize fees, bringing the total to $363.30 to me. :(

Sure, I could likely have gotten another Savage MkII for that; so what? I wanted to try something new, and I am a sucker for short rifles. I'll play with this, keep it or sell it when I decide, and if I lose a few bucks on the deal it's just the cost of the experience of trying out a new gun.



Dang, I wish I hadn't read your post. It made me check out Tenda's site again, where I now see the mention of the upgraded trigger. If it turns out that I am one of the lucky few that got saddled with the original coffee-grinder unit, and later guns are improved...I will be pissed. :(



Mine functions perfectly with every ammo I've tried. I have no idea if Eley would work in it, and I never will. No way I will feed premium stuff to this gun. My cheap-ass POS Chinese rifle simply must function well with cheap-ass POS ammo; otherwise...'bye!

Too soon for me to say that it won't shoot well. I will play with it a bit, will definitely try some standard-velocity stuff (only had hi-vel on hand for initial shooting), might even temporarily mount a bigger scope for testing.

This is CGN, somebody will immediately figure out a way to improve the trigger. If it isn't too much trouble, I might follow their lead and do it...maybe...since I do think that it's the major contributor to the accuracy woes.



Yep...got several Anschutz, Walther and other top-line target rimfires, a bunch of Savages and CZ's, plus assorted other bolts, levers, semi-autos, etc. So what? This is something new and different to play with.

Frankly, when an unknown quantity like this new rifle comes onto the scene, it makes more sense for me to own one than for a new shooter who has few or no other rifles to buy one. I sure as hell wouldn't want to rely upon a new Chinese mystery rifle as my main shooter. It only makes sense...IMHO...to treat it like a novelty, and that's what I will be doing. :)

I lightly polished the contact points of the sear engagement, it got rid of the gritty feeling, but still feels horrible. I think a person could add an adjustment screw by drilling and tapping the front of the trigger housing to limit the excessive travel. I might try it.
Only tried the eley to check accuracy. IMO the extra cost over the Scorpio isnt worth it.
 
My preference? Neither! IMHO, the crown for "best of the cheapest" goes to the Chiappa Bootleg whatchamacallit lever gun; I am enjoying mine so much that I will be getting a full-size buttstock for it which will bulk it up a bit but make it easier to shoot. That little gun has exhibited perfect performance since day one, reasonable accuracy, surprisingly nice trigger feel...and it's a levergun! But I like bolt guns as well and I hope the NorthernRim comes to live here permanently.

Thanks for the review. Don’t mean to derail, but do you have a source for the Chiappa bootleg bandit full size stock? Would like to pick one up for myself. I agree it’s been a great little plinker for the price point.
 
Any chance to post pics of the action without the stock to show what the trigger looks like, and how the barrel and mag interface?

Thanks

Jerry

Pics of the trigger if this worked
 

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Thanks for the review. Don’t mean to derail, but do you have a source for the Chiappa bootleg bandit full size stock? Would like to pick one up for myself. I agree it’s been a great little plinker for the price point.
Don't sweat it; I started the de-rail, but it's my thread so it's all good.

I ordered my stock for the Chiappa from Tillsonburg Gun Shop; $135, I think? Hasn't even arrived yet, but I was thrilled with how a full-length stock turned my Henry Mare's Leg .44 from a novelty into an absolutely terrific little hunting rifle and I expect the same functionality from this one. :)
 
Flushed out the trigger group of the NorthernRim last night using an aerosol foaming cleaner; holy crap! I think they must have test-fired it a dozen or so times at the factory using black powder! I always clean the barrel of a new gun before firing, never go to this extreme until a bit later after a few rounds have been shot. I cannot believe the black gunk that came out of this thing. After a light re-lube, I took it out this morning before temps rose into the stinkin' hot range again and put 200 rounds through it. Trigger action and feel was vastly improved just from being clean; who would've thunk? :) No crunching, no grinding; still a bit heavier than ideal, but surprisingly crisp and quite shootable. I used 3 hi-vel rounds...Federals, Remingtons, Winchester...and a single standard velocity CCI load. Put 50 rounds of each downrange at 50 yards.

I had to go downrange and replace the target stickers I was using before. I was somewhat heartened when I actually measured the original group sizes; the largest group from last night was "only" 3.25 inches, so a bit better than I had guesstimated through the spotting scope. Best group was almost exactly 2 inches; still no prize-winners there.

I've often read about the need to "season" the bore of a rimfire with the new load when changing loads; I've definitely seen the effects of that sometimes, and had no effects whatsoever on other occasions. In this case, the need for this procedure was pretty obvious. All 4 loads today printed their lousiest group first, producing tighter groups thereafter. I'll also mention that my methodology was a bit more serious this time around; I arranged a much more solid seating position, shooting off bags front and rear. So, ignoring the first group in each instance, the gun shot averages of 1,9, 2.2 and 2.3 inches. Better, but not great.

But the single standard-velocity loading shot 4 nice groups of 0.9, 1.0, 1.0 and 1.2 inches. Me likee! This isn't a target rifle. If the first standard-velocity loading I try shoots around an inch @ 50 yards, then this gun fulfils its intended role. And, of course, I'm likely to find something better if I put in some effort.

The herky-jerky feel of the bolt hasn't improved much if any, but I'll be working the bolt all through Rick'n'Morty tonight and hope for good results. :)

So, 300 rounds in and I'm feeling much more positive about this rifle. Unlike the Scorpio, I like the way it looks, and that's a big deal for some folks, me included. Without the Battlestar Galactica stock, the NorthernRim just feels much more compact and lighter; not sure that it really is, can no longer compare the two side by side, but feel is important as well. Things are looking up! :)
 
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Thanks for the detailed report John!

A couple nutz on the other thread were having problems running out of elevation adjustment getting sighted in at 25 yards did you notice any issues sighting in?
 
Thanks for the detailed report John!

A couple nutz on the other thread were having problems running out of elevation adjustment getting sighted in at 25 yards did you notice any issues sighting in?
No, it went pretty smoothly. I used a set of rimfire rings attached directly to the grooved receiver, didn't bother with the pic rail at all. I started with Milletts since they have a fair bit of windage adjustment available due to clamping from both sides, but when it turned out to be pretty well-lined-up I switched to a set of what I believe are Leupold rimfire rings, which clamp only from the one side. Once the scope was mounted I did a rough alignment using a laser bore sighter, which required about a dozen 1/4MOA clicks on each turret. First shots were hitting a couple inches left and a couple inches low, needed only a single adjustment of counted clicks on both windage and elevation to get fairly well-centered groups. I didn't actually zero carefully, since each load I tried hit a bit differently, but getting it to the point where they would at least be touching the 3-inch target sticker was completely straightforward.

Were the guys who had problems using the pic rail? I wonder if that rail might have some degree of slope built in? Were they too high or too low? I think the first step would be to remove the pic rail and try out a set of rimfire rings on the receiver grooves in case that solves the problem.

One thing I noticed was that the receiver, receiver grooves and barrel were all very parallel. Sounds like it should be a given, but...there is a surprisingly large percentage of rifles on which the barrel is visibly off to the left or right, easily seen by the naked eye when sighting carefully down the top. I suspect that I may have lucked out on that, and the next one on the shelf could have been a lot wonkier. And if the windage can be visibly off like that, it seems likely that the elevation of the barrel could suffer the same problem, but it would be pretty hard or impossible to see with the naked eye.

If they are already using receiver grooves and having that problem, then I would think that the easiest solution would be to mount the pic rail and then get a set of the Burris signature rings with the offset polymer inserts.

I seem to have missed the thread containing that discussion? Link, maybe, please? :)
 
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No, it went pretty smoothly. I used a set of rimfire rings attached directly to the grooved receiver, didn't bother with the pic rail at all. I started with Milletts since they have a fair bit of windage adjustment available due to clamping from both sides, but when it turned out to be pretty well-lined-up I switched to a set of what I believe are Leupold rimfire rings, which clamp only from the one side. Once the scope was mounted I did a rough alignment using a laser bore sighter, which required about a dozen 1/4MOA clicks on each turret. First shots were hitting a couple inches left and a couple inches low, needed only a single adjustment of counted clicks on both windage and elevation to get fairly well-centered groups. I didn't actually zero carefully, since each load I tried hit a bit differently, but getting it to the point where they would at least be touching the 3-inch target sticker was completely straightforward.

Were the guys who had problems using the pic rail? I wonder if that rail might have some degree of slope built in? Were they too high or too low? I think the first step would be to remove the pic rail and try out a set of rimfire rings on the receiver grooves in case that solves the problem.

One thing I noticed was that the receiver, receiver grooves and barrel were all very parallel. Sounds like it should be a given, but...there is a surprisingly large percentage of rifles on which the barrel is visibly off to the left or right, easily seen by the naked eye when sighting carefully down the top. I suspect that I may have lucked out on that, and the next one on the shelf could have been a lot wonkier. And if the windage can be visibly off like that, it seems likely that the elevation of the barrel could suffer the same problem, but it would be pretty hard or impossible to see with the naked eye.

If they are already using receiver grooves and having that problem, then I would think that the easiest solution would be to mount the pic rail and then get a set of the Burris signature rings with the offset polymer inserts.

I seem to have missed the thread containing that discussion? Link, maybe, please? :)

I used the rail, shooting low. I removed the barrel, it’s has Loctite holding it in. The two outside grub screw were not making contact with the barrel, centre one was making light contact. There is nothing really indexing the barrel besides the flat that the centre grub screw tightens to. I put the bolt in when reinstalled it to make sure the extractor fit into the groove. The barrel can rotate even with bolt in so I just rotated it until I felt the extractor was centred in groove. I’ll try some rimfire rings on it and try it. Not expecting much. Definitely not happy with this purchase. I’ve owned a lot off 22s and never had one fail to fire any ammo, Some hard bolt close on some ammo in my mtr. Its expected with match chamber. I tried 4 different types eley and all had light strikes, some would fire most wouldn’t. Eley match 100% would not fire. I think the head space is at maximum spec. Cci blazer functioned 100% , federal autmatch about 80%.
 
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